Reference Information (ECM)

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Schematic Reference

Starting and Charging Schematics
Engine Controls Schematics for the 4.3L (LU3) engine
Engine Controls Schematics for the 6.6L (LMM) engine
Engine Controls Schematics for all other engines (w/o LU3 or LMM)

Connector End View Reference

Component Connector End View Index

Description and Operation

Charging System Description and Operation

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information